// <= 1280 px
@media all and (max-width: 1280px) {
  html{
    font-size: 14px;
  }
  main{
    width: 99%;
  }
  aside{
    left:-9%;
    .arrow{
      animation: arrow 1s ease-in infinite;
    }
  }
}

// <= 640px
@media all and (max-width: 640px) {
  html{
    font-size: 12px;
  }
  main{
    width: 98%;
  }
  aside{
    width: 30%;
    left:-28%;
  }
}
